mysql数据库保存微信emoji表情转义

/*
     * 过滤表情
     *  */

    public function parseEmojiTounicode($stremoji){
        $text = preg_replace_callback('/[\xf0-\xf7].{3}/', function($r) { return '@E' . base64_encode($r[0]);}, $stremoji);
        return $text;
    }

    /*
     * 解析表情
     * */
    public  function parseHtmlemoji ($text)
    {
        $text_r = preg_replace_callback('/@E(.{6}==)/', function($r) {return base64_decode($r[1]);}, $text);
        return $text_r;
    }